People who eat lots of fruit and vegetables tend to live longer, we know that.
But is that because of the fruit and vegetables themselves – or because those people also tend to exercise more, smoke less, drink less, sleep better and generally look after themselves?
This is why I am always slightly sceptical when I read yet another headline telling us that one particular food is going to save our lives and help us live for ever in perfect health (especially if it is a paper written by a company marketing that particular food).
But a new study on the humble tomato
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